In software development when many coders are hacking away on the same code, old bugs can unfortunately be re-introduced (aka code regression). This is why all software changes should undergo a thorough testing prior to release (aka regression testing). I posted in a separate thread to ask whether there had been a regression in the code affecting power use. The old posting Mrs_Often linked to above is cited as precedence. My thinking is if it's happened before, it can happen again.